The danger of what you learn first.
In terms of what your knowledge is I have found that there is an extreme disadvantage in what you learn first.
For example, you may hear something from someone, and believe it. Then someone else comes along with an opposing statement, your first instinct is probably to say what you heard first against the opposing statement.
Essentially what I'm getting at is that once you think something is true, it is hard to let go of that truth.
I can't think of something at present which would come to mind in modern times.
However you could go with old hunter-gatherer type people.
These people had VAST collections of knowledge, but not deep theories on why it works. They just simply knew that X plant is good for X negative effect...much like some people don't really know why aspirin helps you...they just know that something inside of it helps you.
So for a hunter gatherer, he might be told that x plant is good for curing a cough, but in reality it might not cause the cough to be better, previous evidence was coincidental.
Then he is told by someone as he is administering treatment that that plant doesn't cure a cough...he may just ignore it.
Or someone might tell you something other than aspirin is what you need to take...which could be true, however it could be false.
Well anyway these aren't extreme cases. But I just wanted a discussion on the topic of how a person's original thought can be detrimental to future thought.
Skepticism is important! But skepticism of your own thought is important as well. From an evolutionary standpoint, believing what you already believe is a good advantage, thus I don't find it odd that we do it.